Anti-roller slip device and anti-roller slip method

Abstract

A kind of anti roller skidding device includes frame, hydraulic system, clamping mechanism, clamping roller, belt speed detection mechanism, driving roller speed detection mechanism, controller, the frame is connected with the cylinder of hydraulic system, the telescopic end of hydraulic system is connected with clamping mechanism, to drive clamping mechanism horizontal reciprocating movement, the end of clamping mechanism is connected with clamping roller, to drive clamping roller to tighten or loosen, belt speed detection mechanism gathers the speed information of conveyor belt, driving roller speed detection mechanism gathers the speed information of driving roller, belt speed detection mechanism, driving roller speed detection mechanism are electrically connected with controller, to transmit speed information to controller, controller is also electrically connected with hydraulic system, to control the work of hydraulic system.The present application also provides a kind of method for preventing roller skidding using anti roller skidding device.The anti roller skidding device of the present application is evenly stressed, does not change the angle of wrapping, and runs stably.

Description

Technical Field

[0001] The present invention relates to the technical field of belt conveyor equipment, and in particular to a roller anti-slip device and a roller anti-slip method. Background Art

[0002] Roller slippage is a common problem in belt conveyors. For example, during heavy-load startup, insufficient belt tension, slippery roller surfaces, and other factors can cause slippage between the belt and drive roller, leading to belt stall. Currently, there are three basic solutions to address belt slippage: 1. Increase belt tension; 2. Increase the belt wrap angle around the drive roller; and 3. Add a wear-resistant, non-slip coating (such as a diamond-patterned rubber coating or ceramic coating) to the drive roller. However, all of these methods have drawbacks. 1. Excessive belt tensioning can cause unstable forces on various belt conveyor components, leading to damage. 2. Increasing the belt wrap angle around the drive roller increases stress on the redirecting roller, making it more susceptible to damage. 3. Even with a wear-resistant, non-slip coating, insufficient belt tension, a slippery drive roller surface, and other factors can still cause slippage between the belt and drive roller. Summary of the Invention

[0003] In view of this, it is necessary to provide an anti-roller slip device that has uniform force, does not change the wrapping angle, and operates stably.

[0004] It is also necessary to provide a method for preventing roller slipping using an anti-roller slip device.

[0005] The control mechanism that this hydraulic cylinder that this hydraulic cylinder is connected with this hydraulic cylinder is that the control mechanism is that the control mechanism of this hydraulic cylinder is that the control mechanism of this hydraulic cylinder is that the control mechanism of this hydraulic cylinder is that the control mechanism of this hydraulic cylinder is that the control mechanism of this hydraulic cylinder is that the control mechanism of this hydraulic cylinder is that the control mechanism of this hydraulic cylinder is that the control mechanism of this hydraulic cylinder is that the control mechanism of this hydraulic cylinder is that

[0006] Preferably, the belt speed detection mechanism includes a suspension, a fulcrum frame, a driven wheel, and a first angular velocity sensor. The head end of the suspension is connected to the frame, the fulcrum frame is arranged at the middle end of the suspension, the upper end of the fulcrum frame is rotatably connected to the suspension, and the lower end of the fulcrum frame is fixedly connected to the frame. The driven wheel is arranged at the end of the suspension, and the distance from the driven wheel to the fulcrum frame is greater than the distance from the head end of the suspension to the fulcrum frame, so that the driven wheel falls onto the belt. The first angular velocity sensor is used to detect the rotation speed of the driven wheel. The first angular velocity sensor is electrically connected to the controller to transmit speed information to the controller.

[0007] Preferably, the driving roller speed detection mechanism includes two support plates, a horizontal cross bar, a spring, a limit block, and a second angular velocity sensor. The support plate is fixedly connected to the frame, the horizontal cross bar is sleeved on the support plate and can slide horizontally, the spring is sleeved on the horizontal cross bar and is located between the two support plates, the limit block is fixed on the horizontal cross bar and is located at the head end of the spring, and the end of the horizontal cross bar is connected to the second angular velocity sensor. The second angular velocity sensor is used to detect the rotation speed of the driving roller. The second angular velocity sensor is also electrically connected to the controller to transmit speed information to the controller.

[0008] Preferably, the frame includes a hydraulic cylinder mounting platform and side plates. The hydraulic cylinder of the hydraulic system is arranged on the hydraulic cylinder mounting platform. The side plates are located on both sides of the hydraulic cylinder mounting platform. The side plates are provided with horizontal guide grooves. A guide rod is provided in the horizontal guide groove. The telescopic shaft of the hydraulic cylinder is fixedly connected to the guide rod, and the guide rod is also rotatably connected to the connecting rod; the side plates are also provided with a fixed shaft, and the middle end of the clamping bracket is rotatably connected to the fixed shaft.

[0009] Preferably, the driving roller speed detection mechanism is arranged on the outside of the side plate.

[0010] Preferably, a limiting rod is provided on the clamping bracket, and the limiting rod is adjacent to the placement frame to prevent the placement frame from swinging significantly after being separated from the belt.

[0011] A method for preventing roller slippage comprises the following steps:

[0012] Step 1: The controller sets a deviation value between the belt moving speed and the driving roller rotation speed, i.e., a preset deviation value;

[0013] Step 2: The belt speed detection mechanism collects the moving speed information of the belt and transmits it to the controller; the driving roller speed detection mechanism collects the rotation speed information of the driving roller and transmits it to the controller;

[0014] Step 3: The controller converts the belt moving speed information into the belt moving speed value; the controller converts the driving roller rotation speed information into the driving roller rotation speed value;

[0015] Step 4: The controller calculates the real-time deviation between the belt moving speed value and the driving roller rotation speed value;

[0016] Step 5: The controller compares the real-time deviation value with the preset deviation value. If the real-time deviation value is greater than the preset deviation value, it means that the belt is loose. Then the controller controls the hydraulic system to retract the telescopic rod, and the clamping mechanism drives the clamping roller to clamp the belt.

[0017] Preferably, a method for preventing roller slippage further comprises:

[0018] Step six: when the clamping mechanism is in the clamping state, if the real-time deviation value is greater than the preset deviation value and lasts for a predetermined time, the controller will issue an alarm to remind relevant personnel to inspect and repair the belt conveyor and troubleshoot the fault.

[0019] Beneficial effect: The anti-roller slip device of the present invention drives the clamping roller to clamp the belt through the clamping mechanism. During the clamping process, the clamping roller and the belt always rotate relative to each other, and the friction force on the belt is very small, thereby reducing the wear on the belt. During the clamping process, the wrap angle of the belt will not change, and at the same time, it will only produce pressure on the driving roller, and there will be basically no effect on the force on other parts of the belt, so it can effectively avoid damage to the conveyor parts. At the same time, the anti-roller slip method of the present invention uses the anti-roller slip device to control the tightness of the belt. Under the action of the belt speed detection mechanism and the driving roller speed detection mechanism, the tension of the belt can be well controlled, and the belt is appropriately tight and will not be over-tightened, causing belt fatigue. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a roller anti-slip device according to the present invention at a preferred angle.

[0021] Figure 2 This is a schematic structural diagram of another preferred angle of the anti-roller slip device of the present invention.

[0022] Figure 3 This is a structural schematic diagram of another preferred angle of the anti-roller skidding device of the present invention.

[0023] Figure 4 This is a schematic diagram of the anti-roller slip device of the present invention in a released state.

[0024] Figure 5 Schematic diagram of the clamping state of the anti-roller slip device of the present invention.

[0025] Figure 6 This is a control information transmission diagram of the present invention.

[0026] In the figure: anti-roller slip device 10, frame 20, hydraulic cylinder placement platform 201, side plate 202, hydraulic system 30, clamping mechanism 40, connecting rod 401, clamping bracket 402, placement frame 403, limit rod 4031, entrainment roller 50, belt speed detection mechanism 60, suspension 601, fulcrum frame 602, driven wheel 603, first angular velocity sensor 604, driving roller speed detection mechanism 70, support plate 701, horizontal cross bar 702, spring 703, limit block 704, second angular velocity sensor 705, controller 80. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Please see Figures 1 to 6 An anti-roller slip device 10 includes a frame 20, a hydraulic system 30, a clamping mechanism 40, an entrainment roller 50, a belt speed detection mechanism 60, a drive roller speed detection mechanism 70, and a controller 80. The frame 20 is connected to the cylinder of the hydraulic system 30, the telescopic end of the hydraulic system 30 is connected to the clamping mechanism 40 to drive the clamping mechanism 40 to move horizontally back and forth, the end of the clamping mechanism 40 is connected to the entrainment roller 50 to drive the clamping roller to tighten or loosen, the belt speed detection mechanism 60 collects the speed information of the conveyor belt, the drive roller speed detection mechanism 70 collects the speed information of the drive roller, the belt speed detection mechanism 60 and the drive roller speed detection mechanism 70 collect the speed information of the drive roller, and the belt speed detection mechanism 60 and the drive roller speed detection mechanism 70 are connected to the cylinder of the hydraulic system 30. The measuring mechanism 70 is electrically connected to the controller 80 to transmit speed information to the controller 80. The controller 80 is also electrically connected to the hydraulic system 30 to control the operation of the hydraulic system 30. The clamping mechanism 40 includes two symmetrically arranged connecting rods 401, a clamping bracket 402, and a placement bracket 403. One end of the connecting rod 401 is hinged to the telescopic shaft of the hydraulic system 30, and the other end of the connecting rod 401 is hinged to one end of the clamping bracket 402. The middle end of the clamping bracket 402 is hinged to the frame 20, and the other end of the clamping bracket 402 is fixedly connected to the placement bracket 403. The placement bracket 403 is arc-shaped, and a clamping roller 50 is respectively provided on both sides of the placement bracket 403.

[0029] The frame 20 of the present invention is used to place the hydraulic system 30, the clamping mechanism 40, the belt speed detection mechanism 60, the driving roller speed detection mechanism 70, etc.

[0030] The hydraulic system 30 of the present invention is used to provide driving force for the clamping mechanism 40. Specifically, the hydraulic rod of the hydraulic system 30 reciprocates horizontally to push the clamping mechanism 40. The hydraulic system 30 is relatively conventional, including a fuel tank, pipes, solenoid valves, and hydraulic rods. The controller 80 controls the extension and retraction of the hydraulic rod by controlling the opening and closing of the solenoid valves.

[0031] The clamping mechanism of the present invention is used to drive the entrainment roller 50 to clamp the belt. Because the entrainment roller 50 is relatively long, a clamping mechanism 40 is provided on each side of the entrainment roller 50. The clamping mechanisms 40 are symmetrically arranged vertically, and the belt is clamped by the combined action of the driving roller and the clamping mechanism 40.

[0032] The belt speed detection mechanism 60 is used to detect the moving speed of the belt.

[0033] In a preferred embodiment, the belt speed detection mechanism 60 includes a suspension 601, a fulcrum frame 602, a driven wheel 603, and a first angular velocity sensor 604. The head end of the suspension 601 is connected to the frame 20, the fulcrum frame 602 is arranged at the middle end of the suspension 601, the upper end of the fulcrum frame 602 is rotatably connected to the suspension 601, and the lower end of the fulcrum frame 602 is fixedly connected to the frame 20. The driven wheel 603 is arranged at the end of the suspension 601, and the distance from the driven wheel 603 to the fulcrum frame 602 is greater than the distance from the head end of the suspension 601 to the fulcrum frame 602, so that the driven wheel 603 falls onto the belt. The first angular velocity sensor 604 is used to detect the rotation speed of the driven wheel 603. The first angular velocity sensor 604 is electrically connected to the controller 80 to transmit speed information to the controller 80.

[0034] Because the left side of the fulcrum frame 602 is heavier than the right side, the left side of the suspension frame 601 naturally tilts downward, allowing it to rest on the belt. As the belt moves, it also drives the driven pulley 603 to rotate, and the speed of the belt movement is the same as the rotation speed of the driven pulley 603. The rotation speed of the driven pulley 603 detected by the first angular velocity sensor 604 is equivalent to the speed of the belt movement.

[0035] The driving roller speed detection mechanism 70 is used to detect the rotation speed of the driving roller.

[0036] In a preferred embodiment, the driving roller speed detection mechanism 70 comprises two support plates 701, a horizontal crossbar 702, a spring 703, a limiting block 704, and a second angular velocity sensor 705. The support plates 701 are fixedly connected to the frame 20. The horizontal crossbar 702 is sleeved on the support plates 701 and can slide horizontally. The spring 703 is sleeved on the horizontal crossbar 702 and located between the two support plates 701. The limiting block 704 is fixed on the horizontal crossbar 702 and located at the first end of the spring 703. The second end of the horizontal crossbar 702 is connected with the second angular velocity sensor 705. The second angular velocity sensor 705 is used to detect the rotational speed of the driving roller. The second angular velocity sensor 705 is also electrically connected with the controller 80 to transmit the speed information to the controller 80.

[0037] The second angular velocity sensor 705 detects the angular velocity of the driving roller. In operation, the spring 703 is always in a compressed state, so that the second angular velocity sensor 705 can be tightly attached to the inner wall of the driving roller. The detection result is more accurate.

[0038] In a preferred embodiment, the frame 20 comprises a hydraulic cylinder mounting table 201 and side plates 202. The hydraulic cylinders of the hydraulic system 30 are arranged on the hydraulic cylinder mounting table 201. The side plates 202 are located on both sides of the hydraulic cylinder mounting table 201. The side plates 202 are provided with horizontal guide grooves, and guide rods are arranged in the horizontal guide grooves. The telescopic shafts of the hydraulic cylinders are fixedly connected with the guide rods, and the guide rods are also rotationally connected with the connecting rods 401. The side plates 202 are also provided with fixed shafts, and the middle ends of the clamping supports 402 are rotationally connected with the fixed shafts.

[0039] In a preferred embodiment, the driving roller speed detection mechanism 70 is arranged on the outside of the side plates 202.

[0040] When the clamping mechanism 40 does not need to clamp, the belt clamping roller 50 is separated from the belt. Correspondingly, the mounting bracket 403 is also in a natural falling state. Since the two sides of the mounting bracket 403 are respectively provided with a belt clamping roller 50, the mounting bracket 403 will be in a horizontal state. In this way, the belt and the belt clamping roller 50 will interfere with each other, thereby causing wear of the belt or generating a clamping force on the belt under the action of gravity, thereby affecting the tightness of the belt.

[0041] Therefore, in a preferred embodiment, the clamping support 402 is provided with a limiting rod 4031 adjacent to the mounting bracket 403 to prevent the mounting bracket 403 from swinging greatly after being separated from the belt.

[0042] The present application collects the speed information of the belt and the driving roller through the speed detection mechanism, and then determines whether the belt needs to be clamped according to the speed difference between the two.

[0043] Specifically, a method for preventing roller slip comprises the following steps:

[0044] Step 1: The controller 80 sets a deviation value between the belt moving speed and the driving roller rotation speed, i.e., a preset deviation value;

[0045] Step 2: The belt speed detection mechanism 60 collects the moving speed information of the belt and transmits it to the controller 80; the driving roller speed detection mechanism 70 collects the rotation speed information of the driving roller and transmits it to the controller 80;

[0046] Step 3: The controller 80 converts the belt moving speed information into a belt moving speed value; the controller 80 converts the driving roller rotation speed information into a driving roller rotation speed value;

[0047] Step 4: The controller 80 calculates the real-time deviation between the belt moving speed and the driving roller rotation speed;

[0048] Step 5: The controller 80 compares the real-time deviation value with the preset deviation value. If the real-time deviation value is greater than the preset deviation value, it means that the belt is loose. Then the controller 80 controls the hydraulic system 30 to retract the telescopic rod, and the clamping mechanism 40 drives the clamping roller to clamp the belt.

[0049] The above method can only detect slippage caused by a loose belt. However, in special circumstances, overtightening the belt can also cause slippage, which is even more harmful. For example, after the belt has been clamped by the clamping mechanism 40 for a period of time, a foreign object may become lodged between the belt and the drive roller, causing the belt to become overtightened and slip. If the belt is further tightened in this situation, the friction encountered by the belt will increase dramatically, causing damage or even an accident. However, false alarms cannot be ruled out, and in such cases, it is necessary to alert relevant personnel.

[0050] Therefore, further, a method for preventing roller from slipping also includes:

[0051] Step six, when the clamping mechanism 40 is in the clamping state, if the real-time deviation value is greater than the preset deviation value and lasts for a predetermined time, the controller 80 will issue an alarm to remind relevant personnel to inspect and repair the belt conveyor and eliminate the fault.

[0052] The above disclosure is only a preferred embodiment of the present invention, and it is certainly not intended to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A roller anti-slip device, characterized in that: It includes a frame, a hydraulic system, a clamping mechanism, an entrainment roller, a belt speed detection mechanism, a drive roller speed detection mechanism, and a controller. The frame is connected to the cylinder of the hydraulic system. The telescopic end of the hydraulic system is connected to the clamping mechanism to drive the clamping mechanism to move horizontally back and forth. The end of the clamping mechanism is connected to the entrainment roller to drive the clamping roller to tighten or loosen. The belt speed detection mechanism collects speed information of the conveyor belt. The drive roller speed detection mechanism collects speed information of the drive roller. The belt speed detection mechanism and the drive roller speed detection mechanism are electrically connected to the controller. To transmit speed information to the controller, the controller is also electrically connected to the hydraulic system to control the operation of the hydraulic system. The clamping mechanism includes two symmetrically arranged connecting rods, a clamping bracket, and a placement frame. One end of the connecting rod is hinged to the telescopic shaft of the hydraulic system, and the other end of the connecting rod is hinged to one end of the clamping bracket. The middle end of the clamping bracket is hinged to the frame, and the other end of the clamping bracket is fixedly connected to the placement frame. The placement frame is arc-shaped, and a belt entrainment roller is respectively provided on both sides of the placement frame; when the belt slips, the belt is clamped by the joint action of the driving roller and the clamping mechanism.

2. The anti-roller slip device according to claim 1, characterized in that: The belt speed detection mechanism includes a suspension, a fulcrum frame, a driven wheel, and a first angular velocity sensor. The head end of the suspension is connected to the frame, the fulcrum frame is arranged at the middle end of the suspension, the upper end of the fulcrum frame is rotatably connected to the suspension, and the lower end of the fulcrum frame is fixedly connected to the frame. The driven wheel is arranged at the end of the suspension, and the distance from the driven wheel to the fulcrum frame is greater than the distance from the head end of the suspension to the fulcrum frame, so that the driven wheel falls onto the belt. The first angular velocity sensor is used to detect the rotation speed of the driven wheel. The first angular velocity sensor is electrically connected to the controller to transmit speed information to the controller.

3. The anti-roller slip device according to claim 1, characterized in that: The driving roller speed detection mechanism includes two support plates, a horizontal cross bar, a spring, a limit block, and a second angular velocity sensor. The support plate is fixedly connected to the frame, the horizontal cross bar is sleeved on the support plate and can slide horizontally, the spring is sleeved on the horizontal cross bar and located between the two support plates, the limit block is fixed on the horizontal cross bar and located at the head end of the spring, and the end of the horizontal cross bar is connected to the second angular velocity sensor. The second angular velocity sensor is used to detect the rotation speed of the driving roller. The second angular velocity sensor is also electrically connected to the controller to transmit speed information to the controller.

4. The roller anti-slip device according to claim 1, wherein: The frame includes a hydraulic cylinder mounting platform and side plates. The hydraulic cylinder of the hydraulic system is arranged on the hydraulic cylinder mounting platform. The side plates are located on both sides of the hydraulic cylinder mounting platform. The side plates are provided with horizontal guide grooves. A guide rod is provided in the horizontal guide groove. The telescopic shaft of the hydraulic cylinder is fixedly connected to the guide rod, and the guide rod is also rotatably connected to the connecting rod; the side plates are also provided with a fixed shaft, and the middle end of the clamping bracket is rotatably connected to the fixed shaft.

5. The roller anti-slip device according to claim 1, characterized in that: The driving roller speed detection mechanism is arranged on the outer side of the side plate.

6. The roller anti-slip device according to claim 1, wherein: The clamping bracket is provided with a limiting rod, which is adjacent to the placement frame to prevent the placement frame from swinging significantly after being separated from the belt.

7. A method for preventing roller slippage using the anti-roller slippage device according to any one of claims 1 to 6: Step 1: The controller sets a deviation value between the belt moving speed and the driving roller rotation speed, i.e., a preset deviation value; Step 2: The belt speed detection mechanism collects the moving speed information of the belt and transmits it to the controller; the driving roller speed detection mechanism collects the rotation speed information of the driving roller and transmits it to the controller; Step 3: The controller converts the belt moving speed information into the belt moving speed value; the controller converts the driving roller rotation speed information into the driving roller rotation speed value; Step 4: The controller calculates the real-time deviation between the belt moving speed value and the driving roller rotation speed value; Step 5: The controller compares the real-time deviation value with the preset deviation value. If the real-time deviation value is greater than the preset deviation value, it means that the belt is loose. Then the controller controls the hydraulic system to retract the telescopic rod, and the clamping mechanism drives the clamping roller to clamp the belt.

8. The method for preventing roller slippage according to claim 7 further comprises: Step six: when the clamping mechanism is in the clamping state, if the real-time deviation value is greater than the preset deviation value and lasts for a predetermined time, the controller will issue an alarm to remind relevant personnel to inspect and repair the belt conveyor and troubleshoot the fault.

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